baber/WOPTO huggingface dataset:
Patent GB-403876-A (GB)
Title: Improvements relating to electron discharge tubes for purposes of sound recording or the like
IPC: H04N5/68
Filed: 1933-05-25
Abstract: 403,876. Amplifying circuits employing vacuum apparatus. ALLGEMEINE ELEKTRICITATS-GES., 2, Friedrich Karl- Ufer, Berlin. May 25, 1933, No. 15174. Convention date, May 27, 1932. [Classes 39 (i) and 40 (v).] A cathode-ray tube or the like El for soundrecording or television has positive retroactive coupling between the anode circuit and the control circuit. A resistance Rs is inserted in the supply lead to the anode A2, and the consequent variation in the potential of the anode is fed through a condenser C2 and resistance Ra to the input of a previous amplifying valve V to bring the feed-back voltage to the correct phase for application to the Wehnelt cylinder Z. According to a modification, a positively biassed auxiliary electrode is placed between the cathode K2 and the control cylinder and is connected capacitively with the control circuit, Fig. 2 (not shown).
Patent GB-164235-A (GB)
Title: Improvements in or connected with galvanic batteries
IPC: H01M50/50
Filed: 1920-06-04
Abstract: 164,235. Oldham, G., and Oldham, J. June 4, 1920. Cases.-A battery case particularly for use with an electric lamp is provided with a screw-down switch h and a spring-plunger contact s for cooperation with the battery terminals. The switch comprises a threaded metal stud g carrying a spring k and disc j at its lower end. The stud passes through a metal bush f secured to the metal case b. The spring contact s is carried by a sleeve r which is clamped by a screw cap n in a recess in an insulating block e carried by the casing. A metal ring q is clamped between the cap n and block e and is connected to an insulated wire w leading from the battery casing. The second lead may be formed by a flexible metal tube y connected to the lid of the casing b.
Patent GB-1429008-A (GB)
Title: Summing amplifier systems
IPC: G05B6/02
Filed: 1973-03-29
Abstract: 1429008 Automatic control systems SYBRON CORP 29 March 1973 [20 April 1972] 15243/73 Heading G3R [Also in Divisions H3-5] A summing amplifier system comprises a high gain inverting amplifier with a first impedance connected at one end to the input terminal for applying a first input signal, a second impedance connected at one end to the amplifier output terminal and at the other to circuit common, a third impedance connected at one end to a first point on the second impedance for supplying an input thereto, and a feedback impedance connected between the amplifier input terminal and a second point on the second impedance, the first point being electrically spaced at least as far from circuit common as is the second point. In a process controller inverting amplifier 21 is fed with an input signal via resistor 11, while the output is applied to an instrument 33 connected to a process control valve 34 in a pipe 35. The input signal is derived from a process variable transmitter 29 connected to a process sensing element 30, via comparison instrument 28 which generates the difference between the input from transmitter 29 and the desired valve, set by means of knob 31. Negative feedback is applied to amplifier 21 by means of a potentiometer network comprising resistors 24, 26 and potentiometer 25; in addition, an adjustable D.C. level shift is fed into tapping point 27 via resistor 17, from a control network comprising adjustable potentiometer 42, resistors 38, 41, and batteries 36, 37. Other impedances may replace the resistors; e.g. resistor 12 may be replaced by a capacitor to give integration.
Patent GB-559036-A (GB)
Title: Improvements in screw-cutting lathes
IPC: B23Q5/40
Filed: 1942-10-30
Abstract: 559,036. Lathes. SHAW, H. R., and VARNDELL, S. H. Oct. 30, 1942, No. 15247. [Class 83 (iii)] In a screw-cutting lathe of the kind wherein the tool is traversed at a lead-screw engaging a nutsegment which may be disengaged by a predetermined point, the lead-screw 9, Fig. 5, is removably secured by a screw 15 in a shaft 8 driven from the work spindle 7 at half the work speed through gearing 16. The bearing 10 for the shaft 8 is secured in the machine frame 11 by a screw 12 so that it may be removed together with the lead-screw when the latter is being changed. The other end of the lead-screw is supported in a bearing 20 in a bar 18 secured to the machine frame 11 and also to a fixed bracket 19, Fig. 2, this bar forming a support for a slidable and rotatable sleeve 25 to which the tool holder 37 is attached. A hand lever 27 is pivoted to the sleeve 25 and carries a pivot 31, Figs. 2 and 4, for a member 30 to which is attached the nut segment 23 for engaging the lead-screw 9. A tooth 32 on the member 30 meshes with a slot 33 in a member 29 secured to the sleeve 25, springs 40 being provided between pins on the member 29, and lever 27 tending to raise the members relatively to the lever and maintain the segment 23 out of contact with the lead-screw and the tool 24 away from the work, A spring 26 is also provided within the sleeve tending to rotate the latter into a position with the lever 27 vertical at the back of the lathe. To start a screwing operation, the operator pulls down the lever 27 until a projection 34 on the member 30 meets a former 35 attached to the front on the headstock. Further pressure on the lever then rocks the member 30 about the pivot 31, causing the segment 23 to engage the leadscrew and swinging the tool down to the work. The operator maintains his pressure on the lever 27 to cause a projection thereon to slide along the former 35, and the sleeve 25 is then traversed for the screwing operation. When the desired length of thread has been cut the projection 34 rides off a step 36 on the former 35, and the springs 40 rock the members 29, 30 to remove the segment from the lead-screw and the tool from the work. On release of the lever 27 the spring 26 returns it to a vertical position and also draws the sleeve 25 axially to its starting position against an adjustable collar 41. The former 35 may be adjusted angularly to cause the lever 27 to rock during the traverse and cut a tapered thread.
Patent GB-597567-A (GB)
Title: Improvements in or relating to the electro-plating of metals
IPC: C25D5/34
Filed: 1942-10-30
Abstract: 597,567. Electroplating. HOTHERSALL, A. W., HOPKINS, D. W., and MACNAIR, J. L. H. Oct. 30, 1942, No. 15324. [Class 41] Metals, after pickling and prior to electroplating, e.g. with corrosion-resistant metals such as lead, tin and cadmium, in an acid bath containing a protein colloid such as glue or gelatine, are given treatment in an alkaline bath, with or without anodic or cathodic electrolytic action. Mechanical cleaning or, in the case of steel sheet or strip, anodic cleaning in a sulphuric acid bath may precede the alkaline bath treatment. Electrotinning of steel sheet and strip, non-ferrous metals and alloys and lead plating, e.g. bearings, from perchlorate, fluoborate or fluosilicate solutions are mentioned.
Patent GB-712951-A (GB)
Title: A process for melt spinning polyethylene terephthalate fibres or yarns
Inventor: HEBELER HAROLD HENRY
IPC: D01D5/098
Filed: 1952-06-18
Abstract: A fibre is produced by extruding a molten polymer containing at least 90 mol. per cent. of polyethylene terephthalate through a spinneret, cooling the extruded material until solidified to a fibre, and pulling the solidified material away from the spinneret at a speed, measured after the material has completely solidified, in excess of 5,200 yards per minute.  The polymer is a condensation product of ethylene glycol and terephthalic acid or an ester-forming derivative thereof and may include up to 10 mol. per cent. of a polymer derived from diethylene glycol, tetramethylene glycol, hexamethylene glycol, hexahydrophthalic acid, dibenzoic acid, adipic acid, sebacic acid, azelaic acid, a naphthalic acid, 2, 5-dimethylterephthalic acid or bis-p-carboxyphenoxyethane or mixtures of these reagents, which may be added to the polymerization mixture or may be separately polymerized and melt-blended with the polyethylene terephthalate. The means for pulling the fibre away from the spinneret may comprise a high-speed wheel, roll or pinch rolls, an air jet, a driven bobbin or a high-speed pirn take-up, and the fibres travel at least 45-50 inches before reaching the pulling-away means.  The spinning temperature may be in the range 260 DEG  to 310 DEG C. Specifications 578,079 and 712,950 are referred to.
Patent GB-787676-A (GB)
Title: Improvements in or relating to automatic telephone coin boxes
IPC: H04M17/02
Filed: 1956-05-17
Abstract: 787,676. Coin-freed telephones. SIEMENS & HALSKE AKT.-GES. May 17.1956 [May 17, 1955], No 15439/56. Class 27 [Also in Group XXXIX] The coin-box of an automatic telephone has a coin storage duct in which coins 5 preparatorily inserted by a caller are lined up and the coins are pushed sideways from the duct one at a time by a cashing lever 17 operated by a solenoid 18 which is energized by metering pulses from the exchange; the duct and other members depending for operation on the size and position of the coins are adjustable to suit coins of different dimensions Inserted coins roll down a testing duct 1 having a hinged clearing wall 4 and rebound from an adjustable buffer 53 into the storage duct which is formed by an upper guide 6, by a lower guide 7 and by a lower coin track 8 on a shaft 9. The clearing wall 4 is tilted when the receiver is replaced on the rest and through a lever 13 and crank 12, it also tilts the coin track to return any coins remaining in the storage duct. The coin duct is inclined sideways so that opposite sides of the coins contact the upper and lower guides respectively and screws 27 and 23 engaging in slots provide adjustment for coin diameter and thickness respectively. A stop 15 projects into the end of the storage duct and is adjustable in a slot 16 to suit the coin diameter. The cashing lever 17, when operated by the solenoid 18, pushes the lower part of a coin against a stop 20 until at the end of the metering pulse it returns to its starting position and releases the coin into an accepted shoot 19. If there is no coin opposite the cashing lever, the lever can move further and an adjustable screw 29 then operates a contact 28 to disconnect the call. A step 34 on a pivoted stop 33 carried by the moving contact spring of the contact 28 moves under a stationary wall 31 to hold the contact open until the receiver is replaced, when a pin 35 on the coin track shaft 9 tilts and releases the stop 33. A spring-loaded feeler 38 pivoted on the cashing lever moves with the cashing lever to check if there is a further coin available in the storage duct and is adjustable relative to the cashing lever by a screw 42. If a further coin is not available, the feeler 38 can continue moving until an adjustable screw 45 operates a contact 36 to energize an audible alarm 35 or visual signal or both. Before a connection can be made, a basic fee must be inserted and this is echecked by a lever 46 pivoted at 47 and spring-loaded against a stop 49. Each time the telephone dial is rotated, the stop 49 is tilted and a feeler 50 adjustably pivoted on the lever can enter the storage duct to contact the coin, or the last of several coins, representing the basic fee. If the basic fee has not been inserted, the lever can move sufficiently to close a contact 56 and interrupt the dialling impulses.
Patent GB-261299-A (GB)
Title: Improvements in feeler mechanism for automatic weft replenishing looms for weaving
IPC: D03D51/34
Filed: 1926-06-19
Abstract: 261,299. British Northrop Loom Co., Ltd., (Northrop Loom Co.). June 19, 1926. Cops.-A cop for use with a " side-swipe" feeler B in an automatic weft-replenishing loom, is wound with a waste hunch W and a slip-preventing bunch P. so that lateral movement of the feeler is prevented until the bunch P is used up. The waste bunch W contains sufficient weft to fill one pick.
Patent GB-754023-A (GB)
Title: Improvements in or relating to filter
IPC: B01D29/96
Filed: 1954-05-26
Abstract: 754,023. Filters. SPARKLER MFG. CO. May 26, 1954 [June 15, 1953], No. 15529/54. Class 46. A tank body 10 is mounted on grooved wheels 12, Figs. 1 and 2 (not shown), at one end and on driving gears 13 at the other. When released from a cover-plate 17 secured to a platform 16 the body 10 may be retracted to the left - by an electric motor 22 mounted on the body and driving, through sprockets and chains, the gears 13 on racks 15 also mounted on the platform. -Limit switches 31, 32 provided on the tank 10 co-operate with stops 33, 37 respectively on the platform 16. The cover-plate and tank body are secured together by engagement of bolts 38 in slots in a ring 40 on the tank body; the bolts can be swung into and out of position by a cam ring 39 mounted on the coverplate. On release of filter pressure the body is motor driven to the right until limit-switch 32 is operated by stop 37. The bolts 38 are then released and the tank body retracted to the left. An inlet pipe 20 is secured in the cover and outlet pipes 21 extend through the cover-plate nearly the full length of the body to form mountings for filter units. A roller is fitted to the inner end of the lower pipe 21.
Patent GB-320050-A (GB)
Title: Improvements in mobile cranes
IPC: B66C23/78
Filed: 1928-05-26
Abstract: 320,050. Jones, C. E. May 26, 1928. Swivelling-wheel hubs.-A three-wheeled portable crane is steered and slued by swivelling the single rear wheel C, which is carried in a swivelling wheel-fork E and is driven by an electric motor G mounted above it. The wheel-fork E is journaled in a bracket a<6> on the vehicle frame, and the motor casing G is fixed either to the bracket a<6> or to the projecting end of the stem e<2> of the wheel-fork. The fork is turned for steering and slueing by a steering wheel and gearing h<1> - - h<5>.
Patent GB-500521-A (GB)
Title: Automatic rifle with breech block mounted on knee-joint
IPC: F41A3/22
Filed: 1938-05-25
Abstract: 500,521. Automatic riftes. WALTHER, F., WALTHER, G., and WALTHER, E., (trading: as WALTHER, C. [Firm of]). May 25, 1938, No. 15575. Convention date, May 26, 1937. [Class 119] In order to avoid constructional difficulties and sighting obstructions, the links 6, 7 of a toggle mechanism governing the breech-block 8 of an automatic rifle are so disposed that they swing out laterally in an oblique upward direction inclined at an, angle of 25-45‹ to . the horizontal plane. A bar 11 I connects the front portion of the luck casing 2 accommodatim; the barrel 3, and the rear portion, to take the strain of the firing action. The bar 11 1 serves as a guide for a breech-hlock guiding - slide 14 coupled to a gas-operared piston-rod 15. The sight is shown at 10 mounted above and close, to the lock mechanism.
Patent GB-585422-A (GB)
Title: Apparatus for testing devices intended to operate under fluid pressure
IPC: G01M3/28
Filed: 1944-08-16
Abstract: 585,422. Leakage measuring apparatus. TRIPP, W. H., and TRIPP, E. N. Aug. 16, 1944, No. 15616. [Classes 54, 69 (i) and 135] [Also in Group XIX] Apparatus for testing the rate of leakage into or from fluid pressure components consists of calibrated transparent capillary tubes of various bores such as 5, 5a and 5b, each of which may be separately connected between a source of fluid pressure 1 and a fluid component under test, e.g. a piston 8 and a cylinder 9, by selector valves 29 ... 32 so that as leakage occurs between the cylinder and piston an indicating liquid 16 is displaced along the tube, the direction of motion depending upon the setting of valves in pipes 17a, 18a, 20a and 21a. The valves 29 ... 32 each consists of a stem 33 screwed into a tapped hole in a cover-plate 26 and provided with a head 34 co-operating with a rubber diaphragm 35 arranged to seal the opening through which the valve stem passes. When the stem is screwed down, the diaphragm is pressed against a seat 36.
Patent GB-551963-A (GB)
Title: Improvements in hinged joints for the side arms of spectacle frames
IPC: G02C5/22
Filed: 1941-12-04
Abstract: 551,963. Spectacles. HIERONIMUS, F. Dec. 4, 1941, No. 15624. [Class 97 (i)] The side arms of spectacles each have a pivot pin passed through them and through a member united to the lens frame flush against its rear face. As shown, the member 3 is a metal strip bent to form limbs 4 having holes 5 for the pivot pin 3; it is secured to the lens frame 1 by rivets 7. The side arm 2 may have a width equal to that of the member 3, and its end may be radiused at 2a and bevelled at 2b, the outer edge of the member 3 having a correspondingly bevelled portion 4a. The members 3 may be secured to lugs projecting from the ends of the lens frame, or the lugs may be omitted, the members being secured directly to the lens rims ; the thickness of each lens rim may be progressively increased so that it is sufficiently thick at the position of the member 3 to receive the member.
Patent GB-1138858-A (GB)
Title: Data storage systems
IPC: C23C8/02
Filed: 1966-04-07
Abstract: 1,138,858. Radiation-sensitive metal oxides or sulphides. ITEK CORP. April 7, 1966 [April 8,1965], No. 15628/66. Heading G2C. Radiation-sensitive media comprising a radiation-sensitive metal of silicon, boron antimony, or tellurium sulphides or oxides on the surface of an aluminium substrate are obtained by (a) applying to the substrate, a metal or silicon, boron, antimony or tellurium compound and heating said substrate and said compound in an atmosphere comprising oxygen including ozone, sulphur or hydrogen sulphide to convert the compounds to the desired oxides and sulphides. Specified metals are titanium, zinc, zirconium, cerium, cadmium, molybdenum, tungsten, bismuth, lead, beryllium, tantalum and indium. The metal or silicon, boron antimony and tellurium compounds may be halides, acetates, nitrates, oxalates, sulphates, hydrolysable aliphatic esters of titanic acid and polymers formed by hydrolysis thereof, the ammonium salt of titanium lactate or titanium acetonyl acetonate, titanium oxychloride or organo metallic compounds containing oxygen. The aluminium oxide concentration on the surface of the substrate may be increased prior to application of the metal, silicon, boron, antimony or tellurium compound. The metal compound may be doped with minor amounts of Fe, Co, Ni, W or Ta ions prior to heating or the spectral response may be altered by treating the media with cyanine dyes, or triphenyl methane diphenyl methane or xanthene dyes. The media may have synthetic resins applied thereto after production e.g. copolymers of butadiene and styrene, polyamides, polyvinyl alcohol, polyvinyl acetate or polyvinyl chloride. The media are developed after exposure to radiant energy by treatment with a solution containing metal ions e. g. Au, Ag, Hg or Cu ions; The latent or visible image formed may be amplified by treatment with an organic reducing agent for the metal ion and an acid. Specified reducing agents are hydroquinone and substituted hydroquinones, metal, (Registered Trade Mark), "Phenidone" (Registered Trade Mark) "Amidol" and p-phenylene diamine. Specified acids are citric oxalic nitric, acetic, perchloric and phosphoric acids.
Patent GB-486568-A (GB)
Title: Improvements in or relating to controlling devices for aeroplanes
IPC: B64C3/54
Filed: 1937-06-05
Abstract: 486,568. Controlling aircraft. FAIREY, C. R. June 5, 1937, No. 15656. [Class 4] An aeroplane wing has its trailing marginal portion split into an upper 16 and a lower 11 section, the section 11 being movable in the manner and by the means set out in Specification 486,565 ; both sections being movable in the manner described in Specification 190,774, [Class 4], the sections 11, 16 being connected by a link 18. The section 16 is mounted on pivots 17 and the ends of the link 18 may be pivoted at the respective centres of pressure of the sections. The sections may be co-extensive or the upper section may terminate forwardly or rearwardly of the lower section. The section 16 and the link 13 may be connected to a common pivot and the link 18 may be extensible being, e.g. spring-loaded or formed by an hydraulic jack. The links may be duplicated, the flaps may be divided into separate lengths and the flap 11 may form a slot during opening.
Patent GB-203386-A (GB)
Title: Improvements in or relating to die-stocks
IPC: B23G1/26
Filed: 1922-06-06
Abstract: 203,386. Jagger, W., and Macdonald, A. June 6, 1922. Stocks and dies.-Die stocks are provided with detachable guideplates 10 secured by axial pressure. The guide-plates are made in sets with central holes 12 corresponding to the various dies used and they are held by large-headed screws 9. The Provisional Specification describes also guide-plates held by pivoted or sliding spring catches which may be provided with operating knobs.
Patent GB-604296-A (GB)
Title: Improvements in or relating to voltage modifying systems
IPC: G05F1/62
Filed: 1945-06-20
Abstract: 604,296. Voltage modifying arrangements. STEVENS, A. H. (Electronic Laboratories, Inc.). June 20, 1945, No. 15689. [Class 38 (iv)] An arrangement for modifying the voltage, supplied to a load connected between leads 23 and 37, from a main battery or source 22, comprises two pairs 1, 2 and 3, 4 of supplemental batteries each of which is connected in series with resistances 7, 10, 13 and 16 respectively across pairs of stationary contacts 5, 6 ; 8, 9 ; 11, 12 and 14, 15 associated with vibrating contacts 17, 18 and 19, 20. Each of the batteries 1, 2, 3 and 4 is also cross-connected between stationary contacts 24, 27 ; 31, 33 ; 25, 28 and 30, 34 respectively, associated with vibrating contacts 26, 29, 32 and 35. All the vibrating contacts are operated simultaneously by the electromagnetic device 42 energized over contacts 19 and 43 from battery 22. In the upper position batteries 1, 2 are connected in parallel with battery 22 to be charged therefrom, whilst batteries 3, 4 are connected to discharge in series with battery 22 to the load. In the lower position batteries 3, 4 are charged and batteries 1, 2 discharge in series with battery 22. In another arrangement, the batteries 1-4 are replaced by condensers.
Patent GB-297134-A (GB)
Title: Internal combustion engines
IPC: F01L5/18
Filed: 1927-06-13
Abstract: 297,134. Reid, P. H. June 13, 1927. Two - stroke - cycle engines. - A sleeve valve 22 is integral with a pump piston 23, and with the power piston 27 controls the exhaust and inlet ports 33, 31 to the combustion chamber; the valve is driven by a crank or eccentric which lags 220‹ behind the power crank so that the exhaust is nearly closed as the outlet port 31 opens. The exhaust port is opened and closed again before the end of the power stroke. The admission port to the pump chamber 17 may be controlled by the pump piston 23 or as shown a lift valve 41 may be used; this valve is worked by the cam 42 which is driven by the connecting rod 45 pinned to the eccentric rod 24<a>. In this arrangement the admission passage 29 to the pump chamber also serves as the transfer passage to the power chamber.